New pictures are out (I don't know how to bring them from other boards onto here (might be against rules anyway)) and due to deduction we know that...
Whitney got Drew because the partner in the picture with him is too short to be any of the other pros (we looked up their heights on said other board)
Due to the picture released of 6 people in LA studio we can tell who Meryl's partner isn't (unless photo was posted later and taken before flight to Orlando or partners didn't travel with Meryl/Charlie to tour date (I strongly doubt that they wouldn't bring partners/rehearse)) Meryl is either paired this week with Val or Mark. The other male pros were in LA in the picture.
This is based on sleuthing and speculation, not spoilers